ADC32J22: How to caculate the RBD value

Kailyn Chen

Part Number: ADC32J22

Hellp，

There is one article on E2E about "JESD204B: How to calculate your deterministic latency” to calculate the total latency of ADC and DAC. The equation is as following:

But there are not above parameters in data sheet, so the question is how to calculate the optimal RBD value?

Best regards

Kailyn

over 4 years ago

0 dBrock over 4 years ago

TI__Genius 12780 points

Hi Kailyn,

Please see the last figure in this blog.

http://e2e.ti.com/blogs_/b/analogwire/archive/2014/12/22/jesd204b-what-is-deterministic-latency-why-do-i-need-it-how-do-i-achieve-it?DCMP=awire&HQS=tlead-dconv-hidc-hpa-hsp-dc-awire-20150116-jesd204bseries-20141222-en

Basically, we need to make sure that the RDB is set at a point where there is no overflow on any of the lanes. This is done in the FPGA. The blog explains this in more detail.

You can set the K value in the ADC32J22 in register 0x31.

Best Regards,

Dan

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ADC32J22: How to caculate the RBD value